Received: 8 May 2021
Accepted: 26 October 2021
First Online: 10 November 2021
: Ethical approval for the study was obtained from the Scientific and Technical Committee of the Can Tho University of Medicine and Pharmacy. The purpose of the study was introduced to the students before they were invited to join the study and asked to give their verbal consent. They were informed that they could refuse to answer any questions or stop completing the questionnaire at any time without giving any explanation, and that all the information would remain confidential. Students were not required to attach their name to the questionnaire. A small compensation of 20,000 VND (less than 1.00 USD) in cash was offered to the students after completing the questionnaire.
: Not applicable.
: The authors declare that they have no competing interests.